CAR T-cell therapy effective for r/r B-cell lymphoma of the GI tract

The use of anti-CD22/CD19 CAR-T sequential infusion was shown to have promising efficacy and safety for relapsed/refractory aggressive B-cell lymphoma with GI involvement, according to the results of a small study reported in Cytotherapy.

The open-label, single-center study enrolled 14 patients with relapsed/refractory aggressive B-cell lymphoma involving the GI tract between November 2017 and January 2019. The researchers examined treatment with sequential infusion of anti-CD22 and anti-CD19 CAR T cells in terms of safety and effectiveness.

An objective response was seen in 10 patients, with 7 of these having a complete response. However, 6 of the patients with partial response or stable disease went on to develop progressive disease. In terms of safety, cytokine-release syndrome and GI adverse events were generally mild and manageable, according to the authors. The most serious events were infections: Two of the patients developed bacterial infections in the GI tract, and one of these died of sepsis early after CAR T-cell infusion.

“The [CD22/CD19 CAR T sequential infusion] regimen was generally safe; however, special attention should be paid to the risk of infection in patients with lymphoma involving the GI tract,” the researchers concluded.

The study was funded by the National Science Foundation of China. The authors reported they had no conflicts of interest.